Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 22.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2021   08:16:09   ( -71.10,-124.84) 12/24/2021   08:17:20  ( -70.98,-123.88)   37.14                71
 12/24/2021   09:06:47   (  70.66,  43.22) 12/24/2021   09:06:51  (  70.66,  43.28)    2.22                 4
 12/24/2021   09:57:30   ( -70.56,-149.30) 12/24/2021   09:56:21  ( -70.54,-149.27)    2.23                69
 12/26/2021   23:43:13   (  70.74,-176.00) 12/26/2021   23:44:22  (  70.72,-176.03)    2.58                69
 12/27/2021   00:33:56   ( -70.63,  -8.51) 12/27/2021   00:33:51  ( -70.66,  -8.49)    3.15                 5
 12/27/2021   01:24:34   (  70.19, 159.51) 12/27/2021   01:23:23  (  70.28, 158.60)   35.70                71
 12/29/2021   15:10:22   ( -70.76, 132.20) 12/29/2021   15:11:20  ( -70.76, 132.27)    2.68                58
 12/29/2021   16:01:06   (  70.64, -60.30) 12/29/2021   16:00:47  (  70.65, -60.25)    2.70                19
 12/29/2021   16:51:37   ( -69.89, 108.19) 12/29/2021   16:50:28  ( -69.94, 106.35)   70.18                69
 01/01/2022   06:37:32   (  70.72,  80.48) 01/01/2022   06:38:17  (  70.75,  80.49)    2.97                45
 01/01/2022   07:28:16   ( -70.65,-112.09) 01/01/2022   07:27:47  ( -70.64,-112.04)    2.59                29
 01/03/2022   22:04:42   ( -70.73,  28.69) 01/03/2022   22:05:17  ( -70.72,  28.69)    1.08                35
 01/03/2022   22:55:26   (  70.62,-163.82) 01/03/2022   22:54:44  (  70.61,-163.83)    1.76                42